Variations of Serum Testosterone Concentrations after Physical Exercises of Different Duration

Guglielmini, C.; Paolini, Angela; Conconi, F

doi:10.1055/s-2008-1025914

Cited by 37 publications

(14 citation statements)

References 14 publications

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“…The match itself induced a slight drop (about 20%) in testosterone level. During exercise, testosterone has been reported to present an initial rise, followed by a decrease approximately 3 h later (Guglielmi et al 1984). In this study, this fall is more precocious (a rugby match lasts 1.5 h) as we reported in a previous study on runners (Lac and Berthon 2000).…”

Section: Testosteronesupporting

confidence: 77%

Behaviour of saliva cortisol [C], testosterone [T] and the T/C ratio during a rugby match and during the post-competition recovery days

Elloumi¹,

Maso²,

Michaux³

et al. 2003

Eur J Appl Physiol

117

103

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Competition is a more demanding situation than other strenuous exercise of equivalent duration; it results in stronger physiological changes. The object of this study was to get information on the duration of the recovery period by measuring changes of saliva cortisol [C], testosterone [T] and their ratio T/C in a group of international rugby players ( n=20) during the week following a rugby match (6 days). Using non-invasive saliva assays, we were able to take samples during the day of competition and the post-competitive days. Hormone levels were assayed with a routine in-house radioimmunoassay (RIA) method. Throughout the competition, C levels increased sharply (about 2.5-fold compared resting values) and returned to basal values within 4 h. Conversely, the T level decreased slightly. During the recovery period, C levels were lower and T levels were higher than basal values, resulting in a very high T/C ratio until the 5th day. This high post-competitive T/C ratio phase is probably required to restore the break-down of homeostasis induced by the very hard mental and physical strain associated with a rugby match. Thus, a period of 1 week recovery appears to be the minimal duration between two competitions.

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Section: Testosteronesupporting

confidence: 77%

Behaviour of saliva cortisol [C], testosterone [T] and the T/C ratio during a rugby match and during the post-competition recovery days

Elloumi¹,

Maso²,

Michaux³

et al. 2003

Eur J Appl Physiol

117

103

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show abstract

“…The difference in these changes resulted from the various exercises intensity and nature, being confirmed by the measured HR values (Table 1). It was shown that the exercise stimulus produced changes in the endocrine system, depending on the intensity and duration of the exercise [11][12][13].…”

Section: Discussionmentioning

confidence: 99%

Impact of special aviation gymnastics instruments training on selected hormones in cadets' blood serum and plasma

Wochyński

Sobiech

2017

Int J Occup Med Environ Health

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Objectives: This study has aimed at investigating the impact of the Special Aviation Gymnastics Instruments (SAGI) training scheme on the blood serum cortisol, testosterone, insulin, and plasma adrenaline, noradrenaline, and dopamine in comparison with a control group. Material and Methods: Fifty-five cadets, aged 20 years old, participated in the study. Cadets were divided into 2 groups: A (N = 41) -the SAGI-trained, and B (N = 14) -the control group. In both groups, blood was the examined material, sampled twice: before the training session (BT) and after the training session (AT), at the beginning (training session I), during (training session II), and after completion of the SAGI training session (training session III). Commercially available kits were used for assaying serum cortisol, testosterone, and insulin as well as plasma adrenaline, noradrenaline, and dopamine. Cadets' physical fitness was assessed by means of Aero-Synthetic Efficiency Tests. Results: In group A, a significant decrease in serum cortisol (training session III) and insulin in three training sessions AT in comparison with the values BT was seen. A statistically significant increase in testosterone and catecholamines was noted in all 3 training sessions AT in comparison with the values BT. In group B, a statistically significant increase in cortisol (training session II), testosterone, and catecholamines was observed in all 3 training sessions AT vs. the values in training session BT. In group B, serum levels of all assayed hormones were higher in training session III than those in group A. Conclusions: In the examined group, the SAGI training produced fewer hormonal changes dependent on the intensity and exercise type and physical efficiency improvement than in the control group. Int J Occup Med Environ Health 2017;30(4):655-664

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“…Immediately after strenuous-prolonged exercise, such as ultramarathon or Ironman triathlons, a 32-58% reduction in serum testosterone concentration has been reported (Ginsburg et al 2001;Guglielmini et al 1984;Neubauer et al 2008). The present study shows that even 48 h after the competition, serum testosterone concentration tended to be reduced whilst dihydrotestosterone was significantly reduced.…”

Section: Discussionmentioning

confidence: 99%

Osteocalcin as a negative regulator of serum leptin concentration in humans: insight from triathlon competitions

et al. 2010

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Osteocalcin is a hormone produced by osteoblasts which acts as a negative regulator of fat mass, protecting against diet induced obesity and insulin resistance in rodents. To determine if an acute increase in osteocalcin concentration is associated with opposed changes in circulating leptin levels and insulin resistance we studied 15 middle and long distance male triathletes, (age 32.1 ± 6.9 years), before and 48 h after an Olympic (OT) or an Ironman (IT) triathlon competition. Muscle power, anaerobic capacity, body composition (dual-energy X-ray absorptiometry), and serum concentrations of testosterone, dihydrotestosterone, osteocalcin, leptin, glucose, insulin and insulin resistance (HOMA) were determined pre- and post-race. Pre- and 48 h post-race total and regional lean body mass was not altered, but fat mass was similarly increased (~250 g) 48 h after the competitions. This elicited an increase in plasma leptin of 33% after the IT while it remained unchanged after the OT, likely due to a 25% increase in plasma osteocalcin which occurred only after the OT (all p < 0.05). Post-race HOMA remained unchanged in OT and IT. Performance was normalized 48 h after the competitions, with the exception of a slightly lower jumping capacity after the IT. Serum testosterone concentration tended to decrease by 10% after the IT whilst dihydrotestosterone was reduced by 24% after the IT. In conclusion, an acute increase in serum osteocalcin concentration blunts the expected increase of serum leptin concentration that should occur with fat mass gain. This study provides evidence for osteocalcin as a negative regulator of serum leptin in humans.

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Variations of Serum Testosterone Concentrations after Physical Exercises of Different Duration

Cited by 37 publications

References 14 publications

Behaviour of saliva cortisol [C], testosterone [T] and the T/C ratio during a rugby match and during the post-competition recovery days

Behaviour of saliva cortisol [C], testosterone [T] and the T/C ratio during a rugby match and during the post-competition recovery days

Impact of special aviation gymnastics instruments training on selected hormones in cadets' blood serum and plasma

Osteocalcin as a negative regulator of serum leptin concentration in humans: insight from triathlon competitions

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